What mass of CH₄ (in grams) produces 3.01X10²³ H₂O molecules when burnt in excess of O₂

$\begin{array}{l}C{H}_4+2O_2\to C{O}_2+2H_{2}O\\ 1{\text{ mole CH}}_{\text{4}}\to 2\text{ moles of }{H}_{2}O\\ 16{\text{ gm CH}}_{\text{4}}\to {\text{ 2X6.02X10}}^{\text{23}}\text{ molecules of }{H}_{2}O\\ 4{\text{ gm CH}}_{\text{4}}\leftarrow 3.01X{10}^{23}\text{ molecules of }{H}_{2}O\end{array}$